WEH® Check Valves for Gas
Reliable backflow prevention for gaseous media
Flow in one direction – maximum safety in the other
WEH® Check Valves for Gas reliably prevent backflow and the formation of hazardous gas mixtures. Designed for installation in systems, pipelines, and withdrawal points, they securely block media flow in only one direction – suitable for combustible or inert gases.
Thanks to their sophisticated design with flow-optimized internal gas routing, durable materials and seals outside the media flow, the valves not only offer maximum operational reliability, but also particularly quiet and low-maintenance operation.
Reliable backflow prevention
Effectively blocks gas flow in one direction – for increased safety and process stability
Low maintenance thanks to a clever sealing concept
Seals outside the media flow protect against wear and extend the service life
Durable & robust
Wear-resistant materials, corrosion-resistant, and designed for high cycle counts
Easy to install & compact
Easy installation even in tight spaces – ideal for new and existing systems
Quiet operation
Flow-optimized valve design and low opening pressure reduce noise emissions
Shut-Off Valves
For filling, mixing & controlling in gas mixing systems – with manual or pneumatic actuation.
Pressure relief module
Protect vacuum pumps from overpressure – with internal or external venting.
Filter Gas
Check Valves for Gas
Quick Connectors
Accessories
Reliable & secure since 1983
As specialists in the gas sector, we have been developing safe and reliable components for renowned manufacturers worldwide for more than 40 years. Technical gases are used in virtually every industry and in many industrial processes. In addition to the production of other mixed gases, they are also used in medical technology, pharmaceuticals, chemicals, food technology and many other areas.
In order to produce or use high quality gases in a reliable manner, you need reliable and powerful process plant technology that also meets the highest economic demands. Over the years, the product range has been continuously expanded, so that today numerous components required for plants for mixing, evacuating, and filling gases are available.
Structure of gas technology plants & systems
Secure shut-off, filtration & backflow prevention – for reliable processes with inert and combustible gases.
Filling / evacuating technical gases
Whether CO₂, nitrogen, or specialty gas – with WEH® Filling Connectors, gas filling is safe, process-clean, and free from time-consuming screwing.
Filling / evacuating breathing air & oxygen
For breathing air and oxygen cylinders: WEH® Quick Connectors ensure fast, tight connections – completely tool-free, with maximum user protection.
Testing of oxygen and breathing air cylinders
Pressure and leak testing of gas cylinders often involves a great deal of time and effort. With WEH ® Test Connectors, all this can be done in a single step—without any screwing.
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All information on the safe commissioning and use of our products.
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Our products are tested and certified according to international standards.
Why WEH?
Quality at WEH
Quality is standard at WEH thanks to 100% final inspection and certified processes.
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By choosing a WEH® product, you’ve chosen long-lasting quality.
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Questions about application, technology, or spare parts? Our team is here for you